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the claim

Mass is the quantity of matter in an object and does not vary in classical physics.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

AS REPORTEDno primary record reached; this is what the reporting says

Is it true that mass is the quantity of matter in an object and does not vary in classical physics?

Yes. Standard educational and reference physics texts state that mass represents the quantity of matter in an object and remains constant within the framework of classical physics, unlike weight.

Verdict: SUPPORTED · 3 sources for, 0 against · Last checked

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Judged against reference works: claims of this kind are settled by reference works, not journal abstracts.

Evidence for · 3
Wikipedia: Mass
Reference article covering this claim directly
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Wikipedia: Mass. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Mass

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More for · 2
LibreTexts: LibreTexts: 2.04: Newtons Second Law of Motion Concept of a System
Explicitly states mass is the quantity of matter and does not vary in classical physics.
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LibreTexts: LibreTexts: 2.04%3A Newtons Second Law of Motion  Concept of a System. (n.d.). LibreTexts. https://phys.libretexts.org/Courses/Skyline/Survey_of_Physics/02%3A_Forces_and_Motion/2.04%3A_Newtons_Second_Law_of_Motion-_Concept_of_a_System

OpenStax: OpenStax College Physics: 4.3 Newton’s Second Law of Motion: Concept of a System
Explicitly states that mass is the quantity of matter and does not vary in classical physics.
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OpenStax: OpenStax College Physics: 4.3 Newton’s Second Law of Motion: Concept of a System. (n.d.). OpenStax. https://openstax.org/books/college-physics/pages/8afa5bc0-8fb5-4d10-bddc-e626afef65ee@

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